Hi, all. I didn't give all the info...it's 15" long and I saw what I thought to be a very small rattle, also black like the end of the snake so hard to discern. You can see how the tip is slightly enlarged far end of this photo, though it's not an ideal photo to tell. I didn't get a good photo of that part of the snake. The sucker was very aggressive striking anything you would put near it's face, so maybe that's a hint if a water snake would act differently, maybe it wouldn't but in case that helps. (By the way, it was dead at this point, that's why it was not curled up and striking in any of the photos)